Rotary cutter.



.No. 746,959. PATENTBD DEG. 15, 1903. '0. 1T. HEADLEY.

ROTARY CUTTER.

APPLICATION FILED AUG .'27, 1903. N0 IODBL. 2 SHEETS-SHEET 1.

lllllllllllllllllllllllll WITNESSES: 11v VEIVTOH Y A TTORNE rs No. 746,959. PATBNTED DEC. 15, 1903.

V c. T. HEADLBY.

ROTARY CUTTER,

APPLICATION FILED AUG. 27, 1903.

X0 IODEL. 2 SHEETS-$11231 2.

wmmssss: INYENTOR ATTORNEYS m: hZORflIS PEYZRS no. waroufno WASH Mama 0 c Ni'rso STATES Patented December 15, 1903.

PAT NT OFFICE.

R-OTARY CUTTER.

SPEGIFIGATION forming part of Letters Patent No. 746,959, dated December 15, 1903.

Application filed August 27, 1903. Serial No. 170.9%. (N0 model.

T0 at whom it may concern:

Be it known that I, CHARLES THERONHEAD- LEY, a citizen of the United States, and a resident of Brunswick, in the county of Glynn and State of Georgia, have made certain new and useful Improvements in Rotary Cutters, of which the following is a specification.

My invention is an improvement inthat,

class of woodworking-machines which are provided with rotary heads having cutters adapted to form grooves or slots for various purposes. My invention is more particularly an improved attachment for i such rotary heads, the same comprising a bracket or foundation-piece of peculiar-construction and a series of grooving-cutters, which are applied and secured to the bracket in an improved manner.

The details of construction, combination, and operation of parts are as hereinafter described, reference being had to accompanying lrawings, in which- I figure 1 is an end view of a rotary cutterhcad with my improved attachment applied thereto, the shaft or arbor being shown in section. Fig. 2 is aside and front view of the parts shown in Fig. 1. Fig. 3 is a top or plan view of the same parts. Fig. 4: is a perspective view of the bracket or foundationpiece detached. Figs. 5 and 6 are perspective views of the cutters. Fig. 7 is a side view representing a modification. Fig. 8 is a side and front view of the parts shown in Fig. 7. I

I will first describe my invention as illustrated in Figs. 1 to 6. The square cutterhead A is provided with T-grooves and applied to the shaftor arbor B in the usual way. My improved bracket or foundation-piece O, to which the cutters D and E are attached, (see Figs. 5, 6) is provided with lateral basefianges 0, (see Fig. 4,) having slots 0, through which bolts 0 are inserted for securing the bracket to the head A. The centrally and outwardly projecting portion 0 of the bracket has its outer side or edge curved upon the arc of a circle corresponding to a radius of the arbor B, and its front end or nose 0 is extended beyond the side flanges c and curved on the under side, which is provided with a series of ratchet-notches c In other words,

the under side of the nose or point 0 is curved on its under-side corresponding to the arc of a circle, and the grooves or notches c are formed transversely at the rear and mid dle portion of the arc, the outer portion of the are being left smooth or plain. The out ter D has a corresponding curve and is provided exteriorly on its rear and middle portion with a series of transverse ratchet-teeth ter D is secured in place by means of a lagscrew G and a block F, (see Fig. 5)-that is to say,the innerfaceorside of the block is grooved corresponding to the outer or lower side of the cutter D, and the lag-screw G passes through the same and through a longitudinal slot formed in the cutter D. It will be seen that by this construction, combination, and arrangement of parts I provide a very firmsupport for the cutter-D, also one which effectively resists back thrust, while the cutter is adapted for convenient adjustment, so that it may be projected beyond the point e of the bracket, as required for cutting grooves of different depths. It will be understood that the radially-projecting portion of the bracket is made slightly less in thicknessor width than the width of the'outter D, so that good clearance is provided in actual work.

It will be observed that in addition to the function above stated the coincident or matching ratchet-teeth and grooves of the'cutter D and the bracket 0 serve, further, to prevent any lateral movement of the cutter, which is an advantage of importance in this class of machines. It will be noted that the lateral flanges c of the bracket are separated or grooved at thefront end, so that the cutter D may extend back as far as permitted by the plane surface of the cutter-head A, also that the block F seats upon such surface of the cutter-head and is therefore held very rigidly in the desired position.

The cutter D is intended chiefly for-cutting across the grain, and I employ in conjunction with it two spur side cutters E, which are constructed and applied as follows:

As shown in Fig. 4, the radially-extended portion 0 of the bracket 0 is provided with two opposite dovetailed grooves 0 which are arranged tangentially or at a forward inclination of about forty-five degrees. A longitudinal slot 0 is provided in the center of the grooves. The cutters E (see Figs. 1, 2, and 6) are provided with beveled side edges .and adapted to fit neatly in the said grooves and forlengthwise adjustment therein, the cutters being secured by means of a screw .0 arranged transversely and passing through the slot 0 The outer projecting ends of the'cutters E are serrated, so that a toothed or saw-like edge is produced. The cutters E project laterally slightly more than the width or lateral thickness of the cutter D, so that in operation they cut the sides of the groove, while the cutter D clears out the fibers thus separated at their ends. It will be further noted, by reference to Fig. 2, that the cutters E incline slightly inward from their outer ends, so that good clearance is always obtained, or, in other words, the cutters do not bind or stick in the groove formed by them.

The cutters D and E are adapted for forming relatively deep grooves; but for still deeper ones I may employ the construction and arrangement of parts indicated in Figs. 7 and 8, where the radial portion of the cutter-head O is provided with a less extended or blunter point and the cutter D is curved corresponding to the arc of a circle of less radius than the cutter D, so that it does not extend into a notch, as indicated in Figs. 1 and 4. The brackets C are provided on one side only with a lateral flange 0 which is right angular in form, being so constructed that it is applied to the adjacent plane surfaces of the cutter-head A. Bolts 0 are applied to both angles of the flange 0 as shown. As indicated in Fig. 8,the cutter-head proper, O, is located adjacent to one end of the cuttor-head A. By means of such angular flange 0 I provide for the firmest possible attachment of the bracket.

It will be seen that my improved grooving attachment is adapted for application to rotary cutter-heads already in use or of the ordin-ary construction and that it may be attached or detached with the same facility as an ordinary cutter.

What I claim isl. The combination, with a bracket adapted for attachment to a rotary cutter-head,and having a radial portion provided with a forwardly-extended nose, or point, whose under side is constructed with transverse ratchetgrooves, of a cutter curved correspondingly and having transverse ratchet-teeth adapted to fit in said grooves, and means for securing said cutter in place, substantia y as described.

2. The combination, with the bracket adapted for attachment to a rotary cutterhead and having a radially-extended portion whose forwardly-projecting nose, or point, is curved on its under side and provided with transverse ratchet-grooves, of a clearing-cutter which is curved upon a corresponding arc and provided with transverse ratchet-teeth adapted to fit in said grooves, and a block and lag-screw applied for securing the cutter, substantially asdescribed.

3. The combination, with a rotary cutterhead having a plane surface, of the improved grooving attachment comprising a bracket having base-flanges, a narrow radial portion having its nose, or point, curved on the underside and provided with transverse ratchetgrooves, a clearing-cutter having a corresponding curvature, and transverse ratchetteeth projecting rearward and adapted to fit in the said grooves, a block fitting the under side of the cutter and abutting the adjacent side of the cutter-head, and a screw-bolt securing said cutter and block in the manner described.

4. The combination, with the cutter-head and the bracket secured thereto and having a thin radial portion whose projecting point is curved and provided with transverse ratchet-grooves and base-flanges which are 5 separated adjacent to such grooves, of a clearing-cutter curved corresponding to the seat provided on the bracket and having rearwardly-projecting ratchet-teeth, that engage the aforesaid grooves, and also a longitudinal slot, and a block shaped on its inner face corresponding to the cutter and its lower end resting upon the cutter-head, and a screwbolt securing the cutter-block in the manner described.

5. The combination,with thebracketadapted for attachment to a rotary cutter-head and havinga thin radially-projecting portion provided with opposite, tangential, dovetailed grooves and a slot extending from one to the other, of serrated cutters adapted to fit and slide in said grooves, and a screw passing through the slot and securing the cutters in the manner described.

6. The combination, with the bracket having a thin radially-extended portion provided With a forwardly-extending nose, or point, of a clearing-cutter applied to the curved under side of said point, and serrated cutters arranged in slots formed in the sides of the projecting portion and projecting laterally to a greater distance than the width of the clearing-cutter, substantially as described.

7. The combination, with a rotary cutterhead having adjacent plane surfaces, of a bracket having seats for grooving-cutters and a base-flange projecting from one side, the said flange being right angular in form and thus adapted to embrace an angle of the cutter-head and means for securing the bracket to the cutter head, substantially as dea clearing-cutter and having in rear thereof scribed. inclined seats-for side cutters, substantially 8: The improved bracket adapted for atas described. I tachinent to a. rotary cutter-head, the same CHARLES THERON HEADLEY. 5 consisting of a, horizontal base portion and a Witnesses:

radiallyprojecting thin portion havinga pro- LOUIS R. FENDIG, jecting nose or point provided with a seat for EDWIN BROBSTON. 

